package r21310.chap04.zoodemo;

public class Test {
    public static void main(String[] args) {
        Square z=new Square();
        z.S1(2);
        z.C1(2);
        z.zheng();
        Circle y=new Circle();
        y.S2(5);
        y.C2(5);
        y.yuan();

    }
}
